Over 130,000 customers are without power across CT.
The storms capable of producing damaging winds, large hail and isolated tornadoes appear to be over for now.
The severe storms have ended, but more rain is expected in the region Wednesday. "AVOID all down trees and utility poles as they may still involve LIVE power lines", the Brookfield Police Department said on Facebook.
Mark Boughton, the Mayor Danbury, Connecticut confirmed via Twitter a man was killed in his pickup truck while trying to wait out the storm.
The storms downed trees and power lines across the region. In the City of Newburgh, New York, officials said an 11-year-old girl had just returned home with her mother and was unloading their SUV when the wind caused a large tree to topple into the vehicle, CBS New York reported.
More than 90,000 customers of the state's two major utilities remained without power on Wednesday morning, majority in the western part of the state.
Damage to train tracks from severe weather has suspended Brunswick, Maryland's MARC's Brunswick Line service.
The passengers were all on the upper vehicle and no one was in distress, Laxton said.
In Connecticut and NY, the storms turned deadly. Most winds were 60-70 miles per hour while a few reached over 70, CNN meteorologist Taylor Ward said.
There were more than 100 reports of hail in states including Ohio, Pennsylvania, New York and CT, the National Weather Service said.
"New York has once again withstood the fury of Mother Nature and now is the time for the state and our local partners to get communities throughout the Mid-Hudson region up and running again", the governor said in a statement.